With the Olympics opening tomorrow in Rio de Janeiro, the world looks to a seaside metropolis with more than six million residents and the first South American city to host an Olympic Games. While Brazil has no ski resorts, Rio features aerial lifts ranging from hundred year-old tramways to modern gondolas connecting the city’s favelas to the regional transit network.

The famous Sugarloaf Mountain twin tramways were among the world’s first cableways of any kind when they debuted in 1912. A century later, Brazilian President Dilma Rousseff championed development of a five-section Poma gondola connecting some of Rio’s largest slums, modeled after the pioneering gondola network in Medellín. In 2013, Doppelmayr built a three-station gondola in Morro da Providência, serving more than 5,000 residents in one of Rio’s oldest favelas. Further urban cable projects proposed for Rio have faltered as the city works to combat challenges we’ve become all too familiar with leading up to the Games.

Teleférico do Alemão is one of the largest and most complex gondola systems in the world with six stations and 152 10-passenger Sigma Diamond cabins. Built by Poma and operated by private train company SuperVia, Teleférico do Alemão opened July 7, 2011. The system is capable of transporting 3,000 passengers per hour over 2.2 miles of dense neighborhoods in 16 minutes. The lift changes angle four times, including a 100-degree turn at Alemão Station.

70,000 residents are eligible for two free rides daily on the gondola, which links favelas in the Complexo do Alemão to the Bonsucesso train station. Six expansive rooftop stations that feature banks, stores and social services rise above the favelas. The gondola system cost approximately $74 million to build and serves 9,000 daily riders. Initial ridership estimates of 30,000 per day have not been realized as Rio has struggled to attract non-residents to ride the teleférico through crime-ridden neighborhoods. Unlike in Medellín and La Paz, residents have criticized the construction of an expensive gondola through communities that lack electricity, clean water and basic sanitation.